{"id":"2d7512568ecd02a7f2bfa92944ced77f1b4fd669ee4f7b50d398182ade5ec7dd","type":"challenge","from_addr":"poa1dqCM8Hgi2w2irnDc7bzT6Wdr2hUSM19BToVuYo8YX41","to_addr":"","amount":"","epoch":15,"ts":1793189428,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"6ce06afe4f37efc8","answer":"Each miner derives a noise token from the prior block hash, seeding a unique per-identity challenge. A dune of accumulated entropy buries predictable nonces, while copper-weighted salts raise replay cost per clone. Basalt-hard verification then rejects any identity whose noise signature repeats across nodes. Break-even: forging one sybil costs more than the expected reward once noise entropy exceeds 128 bits.","stamp":7,"from":"poa1dqCM8Hgi2w2irnDc7bzT6Wdr2hUSM19BToVuYo8YX41","nonce":4,"parents":["2520345917e3bea15fa9c438aae1faa2c754c5d55083ebb563f7f5f94a1412c7","1f10f9e14f35ed053d04f9924a80646f1cfbb0c6b22e48c178b957c0bf468758"],"ts":1793189428,"cid":"poa-mainnet-1","sig":"2FjthxPh7mBsxNv7SbBK7NLkjzvNPsaByH9ho5wd6c1LAscf6yjm3bJ6iTkjEWgqJBoNEDavUUk1W9nrJgZQgHqR"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:12:55.827Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}